CN102678467B - Variable-pitch vertical-shaft wind turbine - Google Patents
Variable-pitch vertical-shaft wind turbine Download PDFInfo
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- CN102678467B CN102678467B CN2012101671057A CN201210167105A CN102678467B CN 102678467 B CN102678467 B CN 102678467B CN 2012101671057 A CN2012101671057 A CN 2012101671057A CN 201210167105 A CN201210167105 A CN 201210167105A CN 102678467 B CN102678467 B CN 102678467B
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- 238000006243 chemical reaction Methods 0.000 claims description 40
- 230000005611 electricity Effects 0.000 claims description 5
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- 230000009466 transformation Effects 0.000 claims 1
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- 210000003746 feather Anatomy 0.000 description 25
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- 238000010586 diagram Methods 0.000 description 4
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- 230000009471 action Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/728—Onshore wind turbines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction
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Abstract
本发明的目的在于提供一种变桨距垂直轴风力机，包括发电机、塔架、风轮、主轴、叶片、伺服电机、主轴编码器、风向仪、风速仪、变桨距控制系统，主轴和发电机分别安装在塔架上，风轮安装在主轴上并绕主轴旋转，风轮的旋转运动经链传动传递到发电机上，叶片安装在风轮上自转并随风轮绕主轴旋转，伺服电机连接叶片，主轴编码器分别连接主轴和风轮并随风轮转动采集风轮瞬时位置，风向仪和风速仪安装在主轴编码器上方，发电机为变桨距控制系统供电，变桨距控制系统控制叶片桨距角。本发明降低了风力机启动风速，提高了启动性能和风能利用率，拓宽了风力机的工作范围，系统灵活性强，应用场合广，经济和社会效益显著。
The purpose of the present invention is to provide a pitch-variable vertical-axis wind turbine, including a generator, a tower, a wind wheel, a main shaft, blades, a servo motor, a main shaft encoder, an anemometer, an anemometer, a pitch control system, a main shaft The wind wheel is installed on the main shaft and rotates around the main shaft. The rotation of the wind wheel is transmitted to the generator through the chain drive. The blades are installed on the wind wheel and rotate around the main shaft with the wind wheel. The servo The motor is connected to the blades, and the main shaft encoder is respectively connected to the main shaft and the wind wheel and collects the instantaneous position of the wind wheel with the rotation of the wind wheel. The wind direction indicator and anemometer are installed above the main shaft encoder. Controls the blade pitch angle. The invention reduces the starting wind speed of the wind turbine, improves the starting performance and wind energy utilization rate, widens the working range of the wind turbine, has strong system flexibility, wide application occasions, and remarkable economic and social benefits.
Description
Technical field
What the present invention relates to is a kind of electricity generating device, specifically wind energy conversion system.
Background technique
Wind energy, as a kind of clean reproducible energy, is the effective alternative energy source that solves energy crisis, and the exploitation of wind energy conversion system has become with development the focus that various countries are studied.The advantages such as vertical axis windmill relies on convenient for installation and maintenance, and blade processing is easy, and noise is low have had the potentiality that compare favourably with commercial horizontal-shaft wind turbine.Yet the vertical axis windmill startability is poor, with wind energy utilization, compare the inferior position that horizontal-shaft wind turbine is lower, limited the development of vertical axis windmill, but research shows that the feather technology is to solve the wind energy conversion system starting problem, reduce the generation of blade vibration and dynamic stall, improve the effective ways of vertical axis windmill combination property.
For the feather technology, people have proposed kinds of schemes, wherein following several schemes are the most representative: American scholar L.Kenyon Liljegren had proposed the imagination with spring adjusting vane feather at patent US4430044 in 1981, but this scheme has increased the difficulty of processing of blade undoubtedly, and when the control of the blade pitch angle of large inertia, seem " unable to do what one wishes "; University of New South Wales adopted the feather scheme that adds counterweight on blade in 2002, utilized centrifugal action to realize the self adaption feather control of blade; The feather vertical axis windmill that Massachusetts, United States energy company utilizes guide rod and cam mechanism successfully to develop to have the cycloid rule, this wind energy conversion system efficiency is higher, startability is good, but this feather structure is more complicated, and wind energy conversion system becomes the restriction that the oar scope is subject to structural parameter.
Summary of the invention
The object of the present invention is to provide the low a kind of feather vertical axis windmill that starts wind speed, wide operating range, high-output power.
The object of the present invention is achieved like this:
a kind of feather vertical axis windmill of the present invention, it is characterized in that: comprise generator, pylon, wind wheel, main shaft, blade, actuating motor, spindle encoder, flow direction vane, anemoscope, variable-pitch control system, main shaft and generator are arranged on respectively on pylon, wind wheel is arranged on main shaft and rotates around the spindle, rotatablely moving of wind wheel is delivered on generator through the chain transmission, blades installation rotation rotating around the spindle with wind wheel on wind wheel, actuating motor connects blade, spindle encoder connects respectively main shaft and wind wheel and rotates and gather the wind wheel instantaneous position with wind wheel, flow direction vane and anemoscope are arranged on the spindle encoder top, generator is the variable-pitch control system power supply, variable-pitch control system is controlled the blade pitch angle.
The present invention can also comprise:
1, described variable-pitch control system comprises single-chip microcomputer, single-chip microcomputer comprises A/D module, interruption and I/O module, flow direction vane, anemoscope signal change into digital signal through the A/D module, the spindle encoder signal changes into digital signal through interruption and I/O module, digital signal output pwm signal after the single-chip microcomputer computing drives actuating motor, and actuating motor is adjusted the blade pitch angle.
2, also comprise power conversion system, power conversion system comprises rectifier, DC/DC transducer, inverter, storage battery, rectifier connects the DC/DC transducer, the DC/DC transducer connects respectively storage battery and inverter, storage battery connects respectively variable-pitch control system and DC load, and inverter connects AC load, and rectifier is connected with generator, it is charge in batteries that the electricity that generator sends is transformed to direct current through DC/DC after by rectifier rectification, and storage battery connects variable-pitch control system.
3, also comprise blade encoder, Hall transducer, H bridge power amplifier module, the blade encoder is arranged on the actuating motor speed end, Hall transducer is arranged on the two ends of blade, H bridge power amplifier module is arranged between single-chip microcomputer and actuating motor, and the pwm signal of single-chip microcomputer output is through H bridge power amplifier module rear driving actuating motor.
Advantage of the present invention is: the present invention has reduced wind energy conversion system and has started wind speed, has improved startability and wind energy utilization, has widened the operating range of wind energy conversion system, and system flexibility is strong, and application is wide, and economic and social benefit is remarkable.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the block diagram of system of electrical servo feather vertical axis windmill of the present invention;
Fig. 3 is electrical servo variable-pitch control system work block diagram of the present invention;
Fig. 4 is electrical servo variable-pitch control system power supply system block diagram of the present invention;
Fig. 5 is electrical servo pitch-variable system fundamental diagram of the present invention (medelling feather control principle drawing);
Fig. 6 is the electrical servo feather control law of each mode of operation of vertical axis windmill of the present invention;
Fig. 7 is electrical servo feather control flow chart of the present invention.
Embodiment
Below in conjunction with accompanying drawing, for example the present invention is described in more detail:
In conjunction with Fig. 1～7, main shaft 4 of the present invention is fixed with pylon 1, wind wheel 3 is around main shaft 4 revolution, blade 5 adopts the two end supports form and is arranged on the wind wheel support arm, blade 5 rotating shafts are connected with wind wheel 3 by angular contact ball bearing, blade 5 is connected by coupling with actuating motor 6, can realize that blade 5 is around self rotating shaft rotation.Spindle encoder 8 inner rings and main shaft 4 are fixed, and outer ring and wind wheel 3 are fixed, and rotate to gather the wind wheel instantaneous position with wind wheel 3.Flow direction vane 9 and anemoscope 10 gather respectively wind speed size and the wind vector of External airflow field, for controller provides input signal.Rotatablely moving of wind wheel is delivered to generator 2 through the chain transmission, completes the conversion of wind energy to electric energy, and the electric energy that generator 2 sends enters power conversion system 11.In the electric power variation process, electric energy is after rectifier 11-1 rectification, be delivered to inverter 11-3 through one-level DC/DC conversion 11-2, and the ac power supply after inversion can be just AC load 11-4 power supply.Direct current through DC/DC conversion 11-2 can be storage battery 11-5 charging simultaneously, and the DC electrical source of storage can be DC load 11-6 power supply, is also variable-pitch control system 12 power supplies of wind energy conversion system, realizes the wind turbine system energy-autarchic.
in conjunction with Fig. 3, variable-pitch control system of the present invention is usingd single-chip microcomputer 16 as control core, wind direction and wind speed and wind wheel corner are as the input signal of system, this input signal is through flow direction vane 9 and anemoscope 10 and spindle encoder 8 collections, A/D module by single-chip microcomputer, interruption and I/O are converted into the discernible digital signal of system, via single-chip microcomputer internal processes algorithm output pwm signal, by H bridge power amplifier module 13, drive actuating motor 6, actuating motor 6 is adjusted the blade pitch angle by worm type of reduction gearing 14, blade encoder 7 is arranged on actuating motor 6 speed end to return to the blade pitch angle position signal.Hall transducer 15 is installed at the blade two ends, in the blade rotary process, carries out location position, has obtained the absolute position of blade rotating angle, avoids simultaneously the generation of blade pitch angle integrating error.
In conjunction with Fig. 4, feather vertical axis windmill of the present invention is self-supporting energy system, and namely the various energy consumptions of electrical servo variable-pitch control system 12 are all to be provided by the electric energy that wind energy conversion system generator 2 sends.The electric energy that generator 2 sends is converted into galvanic current and is 24V storage battery 11-5 charging through power conversion system 11, and the direct current of storage battery 11-5 output is mainly electrical servo variable-pitch control system 12 provides power power-supply and digital power.On the one hand, the 24V direct current is converted to 12V numeral electricity through DC/DC, then transfers the 5V power supply to through switch power LM2576-5, is single-chip microcomputer 16 power supplies.On the other hand, the 24V direct current is actuating motor 6 power supplies through H bridge power amplifier module 13, realizes that the servo feather of blade 5 is controlled; The 24V direct current is also operational amplifier, photoelectric isolated chip 6N137 and the power supply of IR2112 constant power element simultaneously, realizes that finally the servo feather of vertical axis windmill is controlled.
In conjunction with Fig. 5 and Fig. 6, vertical axis windmill feather working principle of the present invention is: according to the wind regime information of flow direction vane 9 and anemoscope 10 collections, the vertical-shaft wind machine controller is enabled different mode of operations, to realize the maximum power output of wind energy conversion system.Its working principle is as follows: (size of startup wind speed is relevant with the efficiency of the friction factor of mechanical structure and generator when gathering wind speed V lower than startup wind speed Vstart, the startup wind speed of vertical axis windmill of the present invention is 2m/s), wind energy conversion system controller resistance of start start-up mode, servo variable-pitch control system utilizes the advantage of shaft resistance type windmill, the adjusting vane propeller pitch angle is realized maximum starting torque control, the low wind speed of realizing wind energy conversion system starts, the operating range under the low wind speed of expansion.When gathering wind speed V when starting between wind speed Vstart and specified operating air velocity VN, wind energy conversion system is operated in the lift operating mode, improves wind energy conversion system maximal wind-energy utilization ratio.When wind speed surpasses rated wind speed and in work wind speed range the time, wind energy conversion system is operated in specified running state, rotation speed of fan is not changing with wind speed, but by regulating load electric current and blade pitch angle, realizes the optimum Match of wind speed, rotating speed and load, to improve the wind energy conversion system output power.When wind speed surpassed work wind speed, servo variable-pitch control system adjusting vane propeller pitch angle, realized the braking of wind energy conversion system, to guarantee security of system.Fig. 6 has provided the feather control law of resistance start-up mode, lift operating mode and specified operating mode.
In conjunction with Fig. 7, the control core device of electrical servo variable-pitch control system of the present invention is single-chip microcomputer, adopts the PID controlling method to realize the feather control of blade.At first the feather process is achieved in that at initial phase composes the PWM value, drive vane 5 rotations, and when blade 5 arrived calibration position, leaf position flag bit M_Flag put 1, and blade 5 stops operating, leaf position flag bit zero clearing simultaneously; When wind wheel 3 rotations trigger the Z signal of spindle encoder 8, trigger external interrupt INT0, wind wheel tick lables position Z_Flag puts 1, wind wheel position zero clearing simultaneously, initialization finishes.The propeller pitch angle adjustment process, at first calculate the blade movement specified rate, and specified rate is carried out to data and process the unification of the unit of realization; After obtaining setting value, enter the error calculation process, and carry out the data processing to avoid the sudden change of leaf position marker bit state; After obtaining error amount, enter the pid stream journey, after PID regulates, need the PWM value is carried out to saturated restriction, to prevent the generation of the full dutycycle situation of PWM; Finally detect the demarcation signal of blade 5, until Interruption triggers, a sampling period finishes.
In the present invention, vertical axis windmill electrical servo feather is controlled and is adopted medelling stage by stage to control, and makes control law more adapt to wind energy conversion system runnability, can realize freely switching of wind energy conversion system operating mode, increases the flexibility that feather is controlled; The feather of medelling is simultaneously controlled the operation that has realized the wind energy conversion system continous-stable, has avoided the long-time holding state of horizontal-shaft wind turbine, has increased the generated energy of vertical axis windmill.
The start up period of wind energy conversion system, electrical servo pitch-variable system adjusting vane propeller pitch angle is realized wind energy conversion system resistance start-up mode, reduces wind energy conversion system and starts wind speed, widens the low wind speed operating range of wind energy conversion system.
Wind energy conversion system by the start up period in specified operation phase transient process, wind energy conversion system adopts lift-type feather control law, and enters lift mode and constantly adjust the blade pitch angle, to realize the maximum instantaneous power output of wind energy conversion system, improves wind energy utilization.
Wind energy conversion system is under specified operating mode, when guaranteeing maximum power output, consider load electricity consumption situation, adjusting by load current and blade pitch angle, realize the optimum Match of wind energy conversion system rotating speed and wind speed and load, increase the proportion of wind energy conversion system maximum power output in the wind energy conversion system running.
At wind speed, during greater than the wind energy conversion system work wind speed, by quick adjustment blade pitch angle, make blade parallel with wind direction, greatly reduce the wind that blade bears and carry, guarantee security of system work; Simultaneously at wind speed during less than survival wind speed, the electrical servo pitch-variable system is regulated again propeller pitch angle automatically, makes blade realize normal operation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101671057A CN102678467B (en) | 2012-05-28 | 2012-05-28 | Variable-pitch vertical-shaft wind turbine |
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| CN2012101671057A CN102678467B (en) | 2012-05-28 | 2012-05-28 | Variable-pitch vertical-shaft wind turbine |
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| CN102678467A CN102678467A (en) | 2012-09-19 |
| CN102678467B true CN102678467B (en) | 2013-11-20 |
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| CN107250531A (en) * | 2014-08-12 | 2017-10-13 | 蒋素芳 | A kind of wind power generation plant and system |
| CN104295441B (en) * | 2014-09-26 | 2017-05-24 | 哈尔滨工程大学 | A vertical axis wind turbine |
| CN104481811A (en) * | 2014-12-03 | 2015-04-01 | 秦春明 | Lift force and resistance force integrated vertical axis wind turbine |
| CN108757303B (en) * | 2018-06-26 | 2019-10-29 | 清华大学 | Inclined shaft variable pitch type vertical shaft fan based on inclination hinged blades |
| CN110318934B (en) * | 2019-07-09 | 2021-06-01 | 中国人民解放军国防科技大学 | A low-flow water body power generation device |
| CN111456900B (en) * | 2020-05-21 | 2024-06-18 | 安徽康迪纳电力科技有限责任公司 | Adjusting device for follow-up angle of vertical windmill wind blade plate |
| CN111622904B (en) * | 2020-06-01 | 2022-02-01 | 安徽理工大学 | Variable pitch control method and system for symmetrical wing type vertical axis wind turbine |
| CN115342029B (en) * | 2022-10-19 | 2023-01-24 | 菏泽天盈新能源有限公司 | a wind generator |
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| CN102011702A (en) * | 2010-05-28 | 2011-04-13 | 曹连芃 | Method and mechanism for controlling propeller pitch angle of vertical-axis wind turbine with magnetic force and wind power |
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| CN202718810U (en) * | 2012-05-28 | 2013-02-06 | 哈尔滨工程大学 | Variable-pitch vertical-shaft wind turbine |
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2012
- 2012-05-28 CN CN2012101671057A patent/CN102678467B/en not_active Expired - Fee Related
Patent Citations (7)
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|---|---|---|---|---|
| CN1858438A (en) * | 2006-06-07 | 2006-11-08 | 严强 | Automatic control system for vertical shaft wind power generator blade rotary angle |
| CN101815861A (en) * | 2007-09-06 | 2010-08-25 | 瓦特有限公司 | Energy extraction device with at least one bank of blades |
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| CN201247964Y (en) * | 2009-01-08 | 2009-05-27 | 北京能高自动化技术有限公司 | Power supply for variable pitch system |
| CN102011702A (en) * | 2010-05-28 | 2011-04-13 | 曹连芃 | Method and mechanism for controlling propeller pitch angle of vertical-axis wind turbine with magnetic force and wind power |
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